import javax.swing.*;
public class bintang1 {
public static void main(String[]args) {
int angka=Integer.valueOf(JOptionPane.showInputDialog("Masukkan Angka"));
for(int i=1;i<=angka;i++) {
for(int j=1;j<=i;j++) {
System.out.print("*");
}
System.out.println();
}
}
}
Hasilnya :
*
**
***
****
*****
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